OFA CPR Techniques & Automated External Defibrillation (AED) 3 — Questions and Answers
Question 1: During two-rescuer CPR, the second rescuer arrives and takes over compressions. What should the compressor change be timed with?
- Every 5 minutes or when the compressor feels tired
- Every 2 minutes or after 5 cycles of CPR (Correct answer)
- Every 10 cycles of compressions
- Only when the AED prompts a rhythm check
Correct answer: Every 2 minutes or after 5 cycles of CPR
Rescuers should switch compressor roles every 2 minutes (5 cycles) to prevent fatigue and maintain high-quality compressions.
Question 2: When placing AED pads on a patient with an implanted pacemaker or defibrillator, the rescuer should:
- Not use the AED, as it will damage the implanted device
- Place pads at least 1 inch away from the implanted device (Correct answer)
- Place pads directly over the implanted device for best contact
- Remove the implanted device before using the AED
Correct answer: Place pads at least 1 inch away from the implanted device
AED pads should be placed at least 1 inch (2.5 cm) away from an implanted device to avoid interference and ensure effective shock delivery.
Question 3: A coworker collapses and is unresponsive. You are alone and have called for help. You should begin CPR in which order?
- Airway, Breathing, Compressions (ABC)
- Compressions, Airway, Breathing (CAB) (Correct answer)
- Breathing, Compressions, Airway (BCA)
- Airway, Compressions, Breathing (ACB)
Correct answer: Compressions, Airway, Breathing (CAB)
Current guidelines prioritize Compressions-Airway-Breathing (CAB) to deliver blood flow to vital organs as quickly as possible.
Question 4: Which hand position is correct for adult chest compressions?
- One hand on the upper third of the sternum
- Heel of both hands on the lower half of the sternum (Correct answer)
- Both hands flat on the left side of the chest over the heart
- Fingers interlaced with palms on the xiphoid process
Correct answer: Heel of both hands on the lower half of the sternum
Place the heel of one hand on the center of the chest (lower half of the sternum) and the other hand on top, interlacing fingers.
Question 5: When using an AED, the voice prompt says 'No shock advised.' What does this mean?
- The AED is malfunctioning and should be replaced
- The patient's rhythm is not shockable; resume CPR immediately (Correct answer)
- The patient has regained a pulse and CPR should stop
- The pads are not making contact; reposition them
Correct answer: The patient's rhythm is not shockable; resume CPR immediately
A 'no shock advised' prompt means the AED detected a non-shockable rhythm such as asystole or PEA; CPR should resume immediately.
Question 6: During CPR, rescue breaths should be delivered over how long a period to avoid gastric inflation?
- Less than 0.5 seconds each
- About 1 second each, enough to see the chest rise (Correct answer)
- 2 to 3 seconds each for maximum oxygen delivery
- Until the stomach visibly rises
Correct answer: About 1 second each, enough to see the chest rise
Each rescue breath should be given over approximately 1 second with just enough volume to produce visible chest rise.
Question 7: What is the target compression rate during adult CPR?
- 60–80 compressions per minute
- 100–120 compressions per minute (Correct answer)
- 130–150 compressions per minute
- As fast as the rescuer can manage
Correct answer: 100–120 compressions per minute
The recommended adult CPR compression rate is 100–120 compressions per minute to optimize perfusion pressure.
OFA CPR Techniques & Automated External Defibrillation (AED) 3
During two-rescuer CPR, the second rescuer arrives and takes over compressions.
What should the compressor change be timed with?